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4 Sheets-Sheet 1 W. B. YATES 85 W. S. HUSON. OPERATING GRIPPER 'I'UMBLER CAMS IN PRINTING PRBSSES.

No. 561,640. Patented June 9, 1896.

(No Model.)

(No Madel.) 4 Sheets-Sheet 2. W; B. YATES & W. S. HUSON. OPERATING GRIPPER TUMBLER CAMS IN PRINTING PRESSES.

No. 561,640. Patented June 9, 1896.

1 nvenz' 01-0 (N0 Model.) 4 Sheets-Sheet 3. W. B. YATES 8: W. S. HUSON. OPERATING GRIPPER TUMBLER CAMS IN PRINTING PRESSES.

Patented June 9, 1896.

flwenzbms' An DREW BAMHAK PHGTOUmQWAsmNBTOiLD C 4 Sheets-Sheet 4.

W 'B. YATES 8n W. S. HUSON. OPERATING GRIPPER TUMIBYLER ems IN PRINTING PRESSES.

No. 561,640. Patented June 9, 1896.

No Model.)

AN DREW a GRAHAM PNQYO 1mmv WASHINGTDN 0c UNITED STATES PATENT EEICE.

WILLIAM B. YATES AND WINFIELD S. HUSON, OF TAUN' ON, MASsACIIUSErTs, ASSIeNonS To run. CAMPBELL PRINTING PRESS AND IiIANUFACTUR-ING COMPANY, on NEW YonK, N. Y.

O PERATING G RIPPER TU M BLER-CAM S IN PRlNTlNG-PRESSES.

SPECIFICATION forming part of Letters Patent No. 561 ,640, dated June 9, 1896. Application filed November 12, 1890. Serial No. 871,263. (No model.)

To all whom it may concern; mechanism, detached, hereinafter described. Be it known that we, WILLIAM 15. YATES Fig. 8 is an end elevation of the parts shown and YVINFIELD S. HUsON, citizens of the in Fig. 7. Fig. 9 shows in front elevation United States, and residents of Taunton, in another modification of the stud-operating the county of Bristol and State of Massachumechanism, detached, hereinafter described. setts, have jointly inventedanew and useful Fig. is an end elevation of the parts shown Improvement in Operating Gripper Tumblerin Fig. 9. Cams in Printing-Presses, which invention is In said figures the several parts are re fully set forth andillustrated in the following spectively indicated by reference numbers 10 specification and accompanying drawings. and letters, as follows: 0

This invention is in particular applicable The numeral 1 indicates the cylinder of a to that class of printing-presses in which the printing-machine partly broken away to excylinder is continuously rotating when in ophibit such portions only as are required to eration, and on which cylinder the sheet to be illustrate the invention; 2, a gripper tumbler- I 5 printed is taken and held by grippers secured cam; 3, an oscillating gripper-shat" t journaled 6 5 to a gripper-shaft journaled in said cylinder in suitable bearings in cylinder 1, upon which and operated by a tun1blercam secured to said cam is secured; at, one of the sheetgripsaid gripper-shaft. Upon one of the ends of pers mounted on said shaft 3; 5, a stud said grippershaft is secured a slotted tummounted in the frame of the machine, oper- 2o bier-cam, which, by the revolution of the cylating as hereinafter described, for closing the inder in conjunction with studs Suitably logrippers, and 5 a stud, operating as hereinafcated, oscillates said shaft to open and close ter described, for opening the grippers. the grippers secured thereto. The numerals 6, 7, and 8 indicate arms The object of this invention is to prevent mounted on a rock-shaft 10, as hereinafter 2 5 injury to the gripper mechanism should the described. To the arm 7 is articulated at tumbler-cam fail to properly engage the studs one end a cam-rod 9, whose opposite end is above mentioned. forked, spanning a shaft on which is mounted The invention will first be described in dea box cam provided with a groove 11, in tail, and then particularly set forth in the which groove a roller 11", journaled in the 0 claims. side of the rod 9, travels. The tumbler-cam So In the accompanying drawings, Figure 1 2 is provided with a central slot .5 and with shows in outline an end view of the cylinder inclined planes 4; upon its outer side. of a printing-machine, partly broken away, The numeral 12 indicates a stop for the in connection with the gripper mechanism gripper tumbler-cam secured in the cylinder hereinafter described. Fig. 2 is a side eleva- 1, Fig. 1, and 13 a supporting side frame or tion of one end of the cylinder, showing the bracket in which the opening and closing gripper mechanism in similar elevation with studs 5 5 are carried and to which their oppart of said mechanism secured to a portion crating mechanism, hereinbefore described, of the framework of the machine. Fig. 3 is secured. 0 shows in side elevation, partly in section, a The arm 7, Figs. 1, 2, 3, and Al, is mounted part of the operating mechanism for the gripupon the hub of arm 6 and secured thereon per opening and closing studs detached. Fig. by frictional contact only, its hub being split 4; is an end view of a part of Fig. 3', taken and clamped over the hub of arm 6 by a through the sectiondine so a, looking to the clamp-bolt Z). The arms 6 and S are rigidly 45 left. Fig. 5 is an elevation of the arm marked secured to the rock-shaft 10 by pins through 9 5 8 in Fig. 3, looking to the right, detached. holes a or otherwise, Fig. 3. Fig. 6 shows, detached, in front and side ele- Referring to Figs. 7, 8, 9, and 10, the arm vation,respectively, the gripper tumbler-cam 7, Fig. 9, is rigidly secured to rock-shaft 1O hereinafter described. Fig. 7 is a front eleby pins in holes 71- or otherwise, and the arms 50 vation of a modified form of stud-operating 6 and 8 are loosely mounted on said rock- I00 shaft, the Hat springs 1%, whose ends are held between lugs Z on said arms, permitting said arms to yield or move a certain distance around the rock-shaft 10 as a center. Said springs are bolted to a lug of arm 7, suitably located. The coiled springs 15, Fig. 7, surrounding the rock-shaft 10, perform the same oiiice as the flat springs 14, (shown in Fig. 9,) the ends of said coiled springs being inserted in holes in the hubs of the arms 6 7 Sand the hub of the arm 7 being pinned fast to the rock-shaft 10 by the pin 7a.

The operation of the invention is as follows: In the ordinary operation of the machine as the cylinder 1 rotates, through the operation of the cam 11, its rod 0, and arm 7, the rockshaft 10 is caused to rock or oscillate, so as to alternately protrude and withdraw the studs 5 5', connected, respectively, to the arms 8 and 0 of said rock-shaft. The several movements of the parts are so timed that when the stud 5 is protruded the cylinder 1 has brought the tumbler-cam 2 in such position that said stud, as the cylinder continues to rotate, enters said slot and thereby imparts an oscillating movement to said cam upon its central pointthe gripper-shaft 3, to which it is securedwhich oscillation, being imparted to said shaft, opens the grippers 4:, secured thereon. At the proper time for closing said grippers the action of the cam 11, through the parts described, withdraws the stud 5 and protrudes the stud 5, which in like manner engaging the slot 3 in the cam 2 closes the grippers by oscillating the cam in the opposite direction. So far this mere action and the parts effecting that action do not differ from what is already known and practiced in the art; but should the tumblercam 2 be accidentallythrown out of its proper position or if for any reason should meet either one of the studs 5 5 at the wrong time breakage of some part of the mechanism would almost certainly take place, due to the momentum of the revolving cylinder 1. In order to prevent such breakage or liability of breakage, the tumbler-cam 2 is provided with the inclined planes t' hereinbefore described, and the arms 6, 7, and 8 are mounted upon the rock-shaft 10, so as to yield or rotate upon said rock-shaft, as hereinbefore described. The efiect of this construction of cam and rock-shaft arms is as follows: The slight power required to overcome the friction of the moving parts in reciprocating the studs 5 5 by the cam 11 is not sufficient to turn the arms 6 7 8 independently of the rock-shaft 10, and said arms when moved by said cam act as if rigidly secured to the rock-shaft 10; but should the tumbler-cam 2in its travel meet either one of the studs 5 5 at the wrong time one of its inclined planes i will strike said stud on its end and, by reason of Iits inclination, force said stud backward out of its way. Such stud in yielding to the cam moves either the arm 6 or 8, as the case may be, with it. If said arms be secured rigidly to the roek-shaft 10, as shown in Figs. 1 to 1, inelusive, said rock-shaft will turn backward within the eye of the hub of the arm 7, said arm being only frictionally clamped upon the hub of the arm 6, as hereinbefore described, the rod 9 and the cam 11 not opposing such movement of the rock-shaft 10; but if the arm 7 be rigidly secured to the rock-shaft 10, as shown in Figs. 7 to 10, inclusive, then either the arm 6 or S will turn upon the rockshaft 10 when the stud 5 or 5, as the case may be, is pushed backward by one of the inclined planes 1' of the cam 2, the rock-shaft 10 remaining unmoved by such yielding of the arm 6 or 8. All danger of breakage of the parts is thus provided for by automatic means.

It is obvious that, if preferred, the arm 7 instead of being rigidly secured to the rock-shaft 10, when used in conjunction with springs for the arms 6 and 8, maybe simply secured by a friction-clamp, as shown in Figs. 1 to 4B, inclusive, the degree of friction being easily regulated by said clamp so that said arm may be capable of yielding under severe strain instead of being absolutely fixed and unyield- If the arms 6 and 8 are fitted with springs, as described, the reactive force of said springs will always keep said arms set at their proper angle on the rock-shaft 10, so that the studs 5 5 will always be protruded the proper distance to engage the tumbler-cam 2; but if the arm 7 be frictionally secured instead of rigidly fixed to the rock-shaft 10 it is obvious that if said rock-shaft be once turned independently of said arm by the backward movement of either of the studs 5 5 the normal angle of said arm thereon must be restored or the studs 5 5 may not be protruded so as to properly engage the tumbler-cam 2. The one stud might be protruded too far and the other not far enough. This result is obviated by the shoulders 19 on said studs, which, either one, coming in contact with the side of the boss in which it is carried on the frame 13. will prevent the stud from being pushed too far in, and the pressure of said shoulder against the boss, if continued, will rotate the rock-shaft 10 independently of the arm 7 far enough to the point where the arm 7 will stand at its normal angle to the arms 6 and S thereon. Thus the whole object of the invention is automatically effected in preventing all danger of breaking any part of the gripper-operating apparatus.

Having thus fully described our said invention, we claim-= 1. In a cylinder printing-press, a gripper tumbler-cam provided with safety-inclines, in combination with sliding studs, mechanism for operating said studs, and a yielding connection between the studs and the operating mechanism, substantially as described.

2. In a cylinder printing-press, a gripper tumbler-cam provided with safety-inclines, in combination with sliding studs, a rock-shaft provided with arms for operating said studs, means for operating said rock-shaft, and a yielding connection between the rock-shaft and its operating mechanism, substantially as described.

3. In a cylinder printing-press, the combination of a gripper tumbler-cam provided with safety-inclines,sliding studs,arock-shaft having rocker-arms connected to the sliding studs, an arm yieldingly connected to operate the rock-shaft, and means for operating this arm, substantially as described.

4.. In a cylinder printing-press, a gripper tumbler-cam provided with inclined planes, in combination with sliding studs, means for operating the same, and yielding rocker-arms, each of said studs being provided With a stop or shoulder connecting it to one of said arms, substantially as described.

7M. B. YATES. WINFIELD S. HUSON. Witnesses:

E. WILLARD DEAN, J. A. THOMPSON. 

